Thread safe | read write need

Question

Hi

Refer code below:

It is currently not suited for thread safety.

If I just protect set value function body with mutex, will it be fully thread safe? It must be because other function is not an issue. Right ?

Or do we need to protect read also in all the case and that arises the need of reader writer mutex ?

Any case where only read function is not protected and write is the only one which must be projected ?
https://sololearn.com/compiler-playground/cUixiJC91t2V/?ref=app

Answer 1

perhaps

https://sololearn.com/compiler-playground/cMmpP5OjSMpD/?ref=app